@article{AUM_2011_65_2_a7,
     author = {Sobczak-Kne\'c, Magdalena and Starkov, Viktor V. and Szynal, Jan},
     title = {Old and new order of linear invariant family of harmonic mappings and the bound for {Jacobian}},
     journal = {Annales Universitatis Mariae Curie-Sk{\l}odowska. Mathematica },
     publisher = {mathdoc},
     volume = {65},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUM_2011_65_2_a7/}
}